10000 kg/h of a solution containing 20 wt.% KNO3 is fed (Stream F) into the evaporator-crystalliser circuit shown below. The feed solution also contains 0.5 wt.% of CaCoz impurity. The evaporator removes pure water vapour (Stream W). After evaporation the solution (Stream M), which is known to contain 65 wt. % KNO3, is then fed into a crystalliser. The product stream (C) consists of pure KNO3 crystals. Saturated solution (Stream B) from the crystalliser containing 55 wt.% KNO3 is recycled back into the evaporator. However, along the way a portion is split off as a purge (Stream P) to prevent the concentration of CaCO3 rising above 5 wt.% (this ensures that none of the CaCo3 starts to precipitate and contaminate the solids product). See diagram below. kg/h X20,W = 1.0 F= 10000 kg/h XONOF = 0.20 XcacoF = 0.005 M=. kg/h RECYCLE R=_kg/h XKNORM = 0.65 XENO3R = 0.55 XcacoAR = 0.05 B CRYSTALS PURGE kg/h C= kg/h P= XKNOLC = 1.0 Following the problem solving methodology taught in this course which includes drawing and labelling a diagram, stating your assumptions, conducting DOF analysis and checking your solution, determine the mass flowrates of all streams and the composition of Streams A and M.
10000 kg/h of a solution containing 20 wt.% KNO3 is fed (Stream F) into the evaporator-crystalliser circuit shown below. The feed solution also contains 0.5 wt.% of CaCoz impurity. The evaporator removes pure water vapour (Stream W). After evaporation the solution (Stream M), which is known to contain 65 wt. % KNO3, is then fed into a crystalliser. The product stream (C) consists of pure KNO3 crystals. Saturated solution (Stream B) from the crystalliser containing 55 wt.% KNO3 is recycled back into the evaporator. However, along the way a portion is split off as a purge (Stream P) to prevent the concentration of CaCO3 rising above 5 wt.% (this ensures that none of the CaCo3 starts to precipitate and contaminate the solids product). See diagram below. kg/h X20,W = 1.0 F= 10000 kg/h XONOF = 0.20 XcacoF = 0.005 M=. kg/h RECYCLE R=_kg/h XKNORM = 0.65 XENO3R = 0.55 XcacoAR = 0.05 B CRYSTALS PURGE kg/h C= kg/h P= XKNOLC = 1.0 Following the problem solving methodology taught in this course which includes drawing and labelling a diagram, stating your assumptions, conducting DOF analysis and checking your solution, determine the mass flowrates of all streams and the composition of Streams A and M.
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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Transcribed Image Text:10000 kg/h of a solution containing 20 wt.% KNO, is fed (Stream F) into the evaporator-crystalliser circuit shown below. The feed solution
also contains 0.5 wt.% of Caco, impurity. The evaporator removes pure water vapour (Stream W). After evaporation the solution (Stream
M), which is known to contain 65 wt. % KNO3, is then fed into a crystalliser. The product stream (C) consists of pure KNO3 crystals.
Saturated solution (Stream B) from the crystalliser containing 55 wt.% KNO3 is recycled back into the evaporator. However, along the way
a portion is split off as a purge (Stream P) to prevent the concentration of CaCOz rising above 5 wt. 6 (this ensures that none of the CaCO3
starts to precipitate and contaminate the solids product). See diagram below.
W =
kg/h
XH20,w = 1.0
F= 10000 kg/h
XKNO3,F = 0.20
XcacoaF = 0.005
RECYCLE
M=
kg/h
R =.
kg/h
XKNO3M = 0.65
XKNO3R = 0.55
Xcaco3R = 0.05
B
CRYSTALS
PURGE
C=_ kg/h
P =
kg/h
XKNO3,C = 1.0
Following the problem solving methodology taught in this course which includes drawing and labelling a diagram, stating your
assumptions, conducting DOF analysis and checking your solution, determine the mass flowrates of all streams and the composition of
Streams A and M.
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